Hi, I want advice on how to overcome my co-dependency. I am currently in a relationship with a woman who is not healthy for me. I am currently anxiously waiting for her to call me so we can go to sleep on call together. A little background we have known each other for a year now. We dated for 6 months at first and then on and off where the breakup was her idea bc she couldn't be alone and couldn't do long distance. She has cheated on me 3 months in knowing of each other, but I still stayed bc it was my first relationship. After that 3 months later she had to go to a new city for a job so she broke up with me bc she couldn't be alone. And saw other people while we still talked. After not being able to live alone she moved in with a friend this friend she really likes her and doesn't leave her company and they have been intimate with each other. Bc she can't religiously marry her she didn't take her seriously. She still lives with her but as "roommates" and now does long distance with me, bc she is with her all the time. Also to mention she has a friend she see's as work she has "kissed", which I am not comfortable with.
How can I understand my strong attachment to someone who has negatively impacted me, and what strategies might help in moving past this relationship, especially when they implore me to stay every time I attempt to leave?